Portable Wheatstone Bridge Manufacturer,Supplier and Exporter in India
Product Code : EL-SI-8037
Jlab Export is a leading Portable Wheatstone Bridge Manufacturer,and suppliers in India
Portable Wheatstone Bridge (code EL-SI-8037) is a self-contained resistance-measuring bridge with four decade dials, a 7-step range multiplier, a built-in galvanometer and a built-in 4.5 V dry battery, covering 0.001 ohm to 11.1 megohm. It is used in college physics and electrical engineering labs, workshops and field checks where a resistance has to be measured accurately without assembling a bridge from separate parts. It is made by Jain Laboratory Instruments Pvt Ltd (JLab) at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Measuring arm | 4 decades: 10 × 1, 10 × 10, 10 × 100 and 10 × 1000 ohms |
| Range multipliers | 7, on a single rotary switch: ×1000, ×100, ×10, ×1, ×0.1, ×0.01 and ×0.001 |
| Range of measurement | 0.001 ohm to 11.1 megohm |
| Galvanometer | Built in, sensitive; Model MO 65, sensitivity 10 µA per division |
| Battery | Built-in 4.5 V dry battery; provision for an external battery when measuring high resistances |
| Push buttons | Two — battery and galvanometer |
| Coil adjustment | Series and ratio coils adjusted to better than 0.05% |
| Overall accuracy | Better than ±0.1% |
| Construction | Fully portable |
| Other version | Portable Wheatstone Bridge, Economical Model |
| Quality check | Each bridge is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-SI-8037 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
How Does It Compare with the Loop Test Version?
| Feature | This bridge (EL-SI-8037) | Portable Wheatstone Bridge with Loop Test |
|---|---|---|
| Resistance measurement | Yes, 7 multipliers from ×1000 to ×0.001 | Yes, the same 7 multipliers |
| Cable fault location | Not provided | Murray loop and Varley loop tests, with 3 extra multiplying factors (10M, 100M and 1000M) for Murray loop |
| Conductance tests | Not listed | Switching arrangement provided |
| Series arm, battery, galvanometer, push buttons | As specified above | Listed as the same |
Choose this bridge for general resistance measurement in teaching and testing labs. Choose the loop test version if students or technicians also need to practise locating faults in cables.
What Is the Portable Wheatstone Bridge Used For?
A Wheatstone bridge finds an unknown resistance by balancing it against known ones: when the galvanometer shows no deflection, the ratio of the two ratio arms equals the ratio of the measuring arm to the unknown. On this instrument the ratio is set with the multiplier switch and the measuring arm with the four decade dials, so the unknown resistance is simply the dial reading multiplied by the multiplier. Because the galvanometer and battery are built in, the bridge is ready to use on a bench or carried to a machine, cable or transformer winding that needs checking.
In physics labs it is used to measure the resistance of coils, wires and resistors and to check values obtained with a meter bridge or post office box; in electrical engineering, diploma and ITI labs it is used for measuring the resistance of windings and cable conductors and as a reference instrument. Press the battery button first and then the galvanometer button so that the galvanometer is not jolted by the switching transient, start with a high multiplier and work down, and use the external battery provision only for high resistances as intended. Remove the internal dry battery if the bridge will be stored for a long time.
What to Specify When Ordering
- Model — this standard portable bridge, the Economical Model, or the version with Murray and Varley loop tests.
- Quantity — the minimum order is 10 units.
- Accessories — spare leads, resistance boxes or standard resistors for practice measurements can be added to the same enquiry.
Frequently Asked Questions
What resistance range can this bridge measure?
From 0.001 ohm to 11.1 megohm, using four decade dials (10 × 1 to 10 × 1000 ohms) and a 7-step multiplier from ×0.001 to ×1000.
How accurate is it?
The series and ratio coils are adjusted to better than 0.05%, and the overall accuracy of measurement is better than ±0.1%.
Does it need an external galvanometer or battery?
No. A sensitive galvanometer (Model MO 65, 10 µA per division) and a 4.5 V dry battery are built in. There is also provision for an external battery when measuring high resistances.
How does it differ from the loop test version?
The loop test version adds Murray and Varley loop tests for locating faults in cables, conductance tests and three extra multiplying factors for the Murray loop; the series arm, battery, galvanometer and push buttons are listed as the same.
What should an export enquiry include?
The model and quantity, the destination country and port or city, the delivery terms you want (for example FOB or CIF), any packing or labelling requirements, and the tender reference if the purchase is for a tender.
Who manufactures this Wheatstone bridge?
Jain Laboratory Instruments Pvt Ltd, trading as JLab, manufactures it at its works in Ambala, Haryana, and quotes for it directly as the maker.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, a physics and electrical lab instruments manufacturer in India, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. The bridge is assembled and adjusted at JLab’s own works rather than bought from a trader, so universities, colleges, dealers and importers buy it factory-direct, each unit is visually inspected before dispatch, and repeat orders are handled by the manufacturer. JLab exports worldwide and ships to buyers in every region — for example Thailand in Southeast Asia, Nigeria in West Africa, Mongolia in East Asia, Mexico in North America and Rwanda in East Africa. Tender information is available on the JLab lab tenders page.
Other Bridges and Resistance Standards
- Portable Wheatstone Bridge with Loop Test — adds Murray and Varley loop tests for locating cable faults.
- Double Portable Bridge — portable Kelvin bridge for low resistances.
- Industrial Double Bridge — double bridge for very low resistances in testing rooms and engineering labs.
- High Meg Resistance Box — 4-dial decade box in the megohm range.
- Resistance Box Constantan & Manganin — decade box with eleven-position switches for known resistances.
Browse the complete Scientific Instrument range or all Indian Instruments.
Request a Quote
Quotes come direct from the manufacturer. Use the Add To Cart enquiry button on this page, or send the model you need, the quantity (minimum 10 units), any accessories, and your delivery location through the contact page.
Last updated: 8 October 2026
